Guide mechanism of the movable iron core of the high-voltage DC relay

Abstract

Guide mechanism of the movable iron core (5) of the high-voltage DC relay, characterized in that it comprises a push rod, wherein the upper segment (1) of the push rod is located on the yoke plate (4) and is attached to the arrangement of the dynamic contacts, and wherein the middle segment (2) and the lower segment (3) of the push rod are led downwards through the yoke plate (4), and wherein the middle segment (2) of the push rod is attached to the movable iron core (5), and wherein the movable iron core (5) is located within the permeability cylinder (7) of the U-shaped yoke (6), and wherein a lower sleeve (8) is attached within the permeability cylinder (7), and wherein the lower sleeve (8) is located below the movable iron core (5), and wherein the lower sleeve (8) forms a lower guide hole (11) extending vertically.and wherein the lower segment (3) of the push rod is always fitted within the lower guide hole (11) of the lower sleeve (8), and wherein the push rod and the inner wall of the lower guide hole (11) form a smooth contact, wherein the lower sleeve (8) is a conical structure in which the diameter of the upper end is larger than the diameter of the lower end, wherein the outer diameter of the upper end of the lower sleeve (8) is smaller than the inner diameter of the permeability cylinder (7), and wherein the outer diameter of the lower end of the lower sleeve (8) is larger than the inner diameter of the permeability cylinder (7), and wherein the lower sleeve (8) is fitted by bottom-up compression within the permeability cylinder (7).

Description

Technical area

[0001] The present invention relates to a high-voltage DC relay, particularly to a guide mechanism of the movable iron core of the high-voltage DC relay. State of the art

[0002] After the high-voltage DC relay is turned on, the push rod attached to the movable iron core may have a radial displacement relative to the permeability cylinder under the action of magnetic force. That is, the axis of the push rod and the axis of the permeability cylinder may form a certain angle, so that the axis of the movable iron core and the axis of the permeability cylinder also form a certain angle. This results in the friction force between the movable iron core and the push rod and the inner wall of the permeability cylinder increasing during the upward and downward movement of the movable iron core and the push rod. On the one hand, this will lead to a reduction in the sensitivity of the relay and an untimely response; on the other hand, it will lead to an increase in the power consumption of the relay, and even cause the relay to be burned out and lose its effectiveness.

[0003] JP 2005-26 183 A relates to an electromagnetic switching device for opening and closing an electric circuit in a movable body powered by electrical energy.

[0004] JP 2001-6 925 A relates to a two-way proportional magnet in which a movable iron core is arranged so that it is attracted by two fixed iron cores.

[0005] CN 2 02 940 181 U an E-shaped monostable permanent magnet mechanism with a closed magnetic circuit. Content of the invention

[0006] It is an object of the present invention to provide a guide mechanism of the movable iron core of the high-voltage DC relay, which can improve the sensitivity of the relay, reduce the power consumption of the relay, prolong the service life of the relay, and reduce the manufacturing cost.

[0007] To achieve the above objective, the present invention utilizes the following technical solution: a guide mechanism of the movable iron core of the high-voltage DC relay, comprising a push rod, the upper segment of the push rod being located on the yoke iron plate and fixed to the dynamic contact assembly, the middle segment and the lower segment of the push rod being extended downward through the yoke iron plate, the middle segment of the push rod being fixed to the movable iron core, the movable iron core being located within the permeability cylinder of the U-shaped yoke iron, a lower sleeve being fixed within the permeability cylinder, the lower sleeve being located below the movable iron core, and the lower sleeve forming a lower guide hole extending vertically through the lower guide hole.and wherein the lower segment of the push rod is always fitted within the lower guide hole of the lower sleeve, and wherein the push rod and the inner wall of the lower guide hole form a smooth contact.,

[0008] In the present invention, a lower sleeve is arranged inside the permeability cylinder, so that the lower segment of the push rod is always fitted within the lower guide hole of the lower sleeve, so that the movable iron core and the push rod do not have radial displacement during the upward and downward movement process, so that the coaxiality between the movable iron core, the push rod and the permeability cylinder is ensured, so as to reduce the friction force between the movable iron core and the permeability cylinder and the friction force acting on the push rod, so that the movable spring washer fixed to the push rod can have a quick movement to respond to the switching on and off of the relay, thereby improving the sensitivity of the relay and realizing timely response;In addition, the power consumption of the relay is reduced due to the reduction of friction force, thereby reducing the requirement for the number of windings of the coil, so that the manufacturing cost of the relay is reduced.;

[0009] The lower sleeve is a cone structure, with the upper end diameter larger than the lower end diameter, the outer diameter of the upper end of the lower sleeve smaller than the inner diameter of the permeability cylinder, and the outer diameter of the lower end of the lower sleeve larger than the inner diameter of the permeability cylinder. The lower sleeve is pressed from the bottom up and fits within the permeability cylinder. Using the lower sleeve in a cone structure, the lower sleeve can be easily fitted into the permeability cylinder, and reliable positioning is achieved for the lower sleeve.

[0010] Preferably, a hollow chamber is formed in the lower half of the lower sleeve, wherein the lower guide hole leads to the hollow chamber, and wherein a plurality of longitudinal length-changing grooves are provided on the chamber wall of the hollow chamber, so that the lower sleeve is retractable when fitting into the permeability cylinder and, after fitting to the correct position, the lower sleeve can be confined within the permeability cylinder to realize quick assembly of the lower sleeve.

[0011] Preferably, the plurality of longitudinal length changing grooves are evenly spaced along the circumferential direction of the lower sleeve so that the respective locations of the lower half of the lower sleeve are identically retracted to ensure coaxiality between the lower guide hole of the lower sleeve and the push rod.

[0012] Preferably, a through hole for guiding the push rod is formed on the yoke iron plate, wherein an upper sleeve is fixed within the through hole, and wherein the upper sleeve forms a vertically continuous upper guide hole, and wherein the push rod and the inner wall of the upper guide hole form a smooth contact. The upper sleeve and the lower sleeve guide the two ends of the push rod on the movable iron core to further prevent displacement of the movable iron core and the push rod.

[0013] Preferably, at least three outwardly projecting ribs are formed on the outer wall of the upper sleeve, wherein the ribs are arranged longitudinally and aligned parallel to the axis of the upper sleeve; and wherein the ribs are distributed along the circumferential direction of the upper sleeve at equal intervals on the outer wall of the upper sleeve. With the ribs having a certain thickness, it can be facilitated that the upper sleeve and the through hole of the yoke iron plate are fastened to each other so that the upper sleeve can be clamped within the through hole; to facilitate the assembly of the upper sleeve, the thickness of the ribs should not be arranged too large.

[0014] Preferably, the upper sleeve comprises an upper sleeve upper portion, an upper sleeve central portion, and an upper sleeve lower portion. The ribs are arranged on the outer wall of the upper sleeve central portion, and the upper sleeve lower portion has a conical structure in which the diameter of the upper end is larger than the diameter of the lower end. The arrangement of the upper sleeve lower portion allows the upper sleeve to be more easily fitted into the through hole of the yoke iron plate.

[0015] Preferably, the upper part of the upper sleeve is formed as an annular structure whose diameter is larger than that of the central portion of the upper sleeve.

[0016] Preferably, the longitudinal section of the movable iron core through the axis is H-shaped, wherein the upper end of the movable iron core forms an upper cavity of the movable iron core, and wherein the lower end of the movable iron core forms a lower cavity of the movable iron core, and wherein the upper cavity of the movable iron core passes upward through the movable iron core, and wherein the lower cavity of the movable iron core passes downward through the movable iron core, and wherein a fastening portion of the push rod is arranged between the upper cavity of the movable iron core and the lower cavity of the movable iron core, and wherein the push rod and the fastening portion of the push rod form a threaded fastening. With the above arrangement, the manufacturing cost of the movable iron core can be reduced.

[0017] With the present invention, the upward and downward movement of the movable iron core and the push rod can be facilitated when the number of windings of the coil is maintained, moreover, the manufacturing cost of the movable iron core and the push rod in normal use can be reduced. Short description of the drawing Fig. 1 shows a schematic sectional view of the present invention. Fig. 2 shows a schematic structural view of the lower sleeve of the present invention. Fig. 3 shows another schematic structural view of the lower sleeve of the present invention. Fig. 4 shows a schematic structural view of the upper sleeve of the present invention. Detailed embodiments

[0018] As in Fig. 1 shows a guide mechanism for the movable iron core of a high-voltage DC relay, comprising a push rod, the push rod comprising an upper segment 1, a middle segment 2, and a lower segment 3, the upper segment 1 of the push rod being located on the yoke iron plate 4 and fixed to the dynamic contact assembly, the middle segment 2 and the lower segment 3 of the push rod extending downward through the yoke iron plate 4, the middle segment 2 of the push rod being fixed to the movable iron core 5, the movable iron core 5 being located within the permeability cylinder 7 of the U-shaped yoke iron 6, and a lower sleeve 8 being fixed within the permeability cylinder 7, the lower sleeve 8 being located below the movable iron core 5, and the lower sleeve 8 forming a lower guide hole 11 extending vertically therethrough.and wherein the lower segment 3 of the push rod is always fitted within the lower guide hole 11 of the lower sleeve 8, and wherein the lower segment 3 of the push rod and the inner wall of the lower guide hole 11 form a smooth contact.,

[0019] As in Fig. 1, Fig. 2 and Fig. 3, the lower sleeve 8 is a tapered structure in which the diameter of the upper end is larger than the diameter of the lower end, the outer diameter of the upper end of the lower sleeve 8 is smaller than the inner diameter of the permeability cylinder 7, and the outer diameter of the lower end of the lower sleeve 8 is larger than the inner diameter of the permeability cylinder 7, and the lower sleeve 8 is pressed from the bottom up and fitted within the permeability cylinder 7. The taper of the tapered structure of the lower sleeve 8 can be adjusted as needed to suit relays of various model numbers and sizes.

[0020] A hollow chamber 14 is formed in the lower half of the lower sleeve, the lower guide hole 11 being connected to the hollow chamber 14, and three longitudinally arranged length changing grooves 15 are provided on the cavity wall of the hollow cavity 14, and the length changing groove passes downward through the lower sleeve 8, and the chamber 14 passes downward through the lower sleeve 8, and the three length changing grooves 15 are arranged spaced apart along the circumferential direction of the lower sleeve 8.

[0021] As in Fig. 1 and Fig. 4, a through hole for leading out the push rod 4 is formed on the yoke iron plate 4, an upper sleeve 9 is fixed inside the through hole, and the upper sleeve 9 forms an upper guide hole 21 extending through in the vertical direction, and the push rod and the inner wall of the upper guide hole 21 form a smooth contact.

[0022] As in Fig. 4, the upper sleeve 9 comprises an upper sleeve upper part 22, an upper sleeve central portion 23, and an upper sleeve lower part 24. Three outwardly projecting ribs 25 are formed on the outer wall of the upper sleeve central portion 23. The ribs are arranged longitudinally and aligned parallel to the axis of the upper sleeve 9, and the three ribs 25 are distributed along the circumferential direction of the upper sleeve at equal spacings on the outer wall of the upper sleeve central portion 23. The upper sleeve upper part 22 is formed as an annular structure whose diameter is larger than that of the upper sleeve central portion 23, and the upper sleeve lower part 24 is a conical structure in which the diameter of the upper end is larger than the diameter of the lower end.

[0023] As in Fig.1, the longitudinal section of the movable iron core 5 through the axis is H-shaped, wherein the upper end of the movable iron core 5 forms an upper cavity 31 of the movable iron core, and wherein the lower end of the movable iron core 5 forms a lower cavity of the movable iron core 5, and wherein the upper cavity 31 of the movable iron core passes upward through the movable iron core 5, and wherein the lower cavity 32 of the movable iron core passes downward through the movable iron core 5, and wherein a fastening portion of the push rod is arranged between the upper cavity 31 of the movable iron core and the lower cavity 32 of the movable iron core, and wherein the central portion 2 of the push rod and the fastening portion of the push rod form a threaded fastening.

[0024] The present invention provides a guide for the upper and lower ends of the push rod via the lower sleeve and the upper sleeve to prevent deviation of the movable iron core fixed to the push rod and reduce the frictional force of the upward and downward movement of the movable iron core, so that the movable iron core and the push rod can be pushed more easily. With the present invention, the upward and downward movement of the movable iron core and the push rod can be facilitated when the number of windings of the coil is maintained. Furthermore, it can ensure that the number of windings of the coil can be reduced during normal use of the movable iron core and the push rod, thus reducing manufacturing costs.

Claims

[1] Guide mechanism of the movable iron core (5) of the high-voltage DC relay, characterized bythat it comprises a push rod, wherein the upper segment (1) of the push rod is located on the yoke iron plate (4) and is fastened to the arrangement of dynamic contacts, and wherein the middle segment (2) and the lower segment (3) of the push rod are led downwards through the yoke iron plate (4), and wherein the middle segment (2) of the push rod is fastened to the movable iron core (5), and wherein the movable iron core (5) is located within the permeability cylinder (7) of the U-shaped yoke iron (6), and wherein a lower sleeve (8) is fastened within the permeability cylinder (7), and wherein the lower sleeve (8) is located below the movable iron core (5), and wherein the lower sleeve (8) forms a lower guide hole (11) extending in the vertical direction, and wherein the lower segment (3) of the push rod is always fitted within the lower guide hole (11) of the lower sleeve (8),and wherein the push rod and the inner wall of the lower guide hole (11) form a smooth contact, wherein the lower sleeve (8) is a conical structure in which the diameter of the upper end is larger than the diameter of the lower end, wherein the outer diameter of the upper end of the lower sleeve (8) is smaller than the inner diameter of the permeability cylinder (7), and wherein the outer diameter of the lower end of the lower sleeve (8) is larger than the inner diameter of the permeability cylinder (7), and wherein the lower sleeve (8) is pressed from bottom to top within the permeability cylinder (7). [2] Guide mechanism of the movable iron core (5) of the high-voltage DC relay according to claim 1, characterized bythat a hollow chamber (14) is formed in the lower half of the lower sleeve, wherein the lower guide hole (11) leads to the hollow chamber (14), and wherein a plurality of longitudinal length-changing grooves (15) are provided on the chamber wall of the hollow chamber. [3] Guide mechanism of the movable iron core (5) of the high-voltage DC relay according to claim 2, characterized by that the plurality of longitudinal length-changing grooves (15) are evenly spaced along the circumferential direction of the lower sleeve (8). [4] Guide mechanism of the movable iron core (5) of the high-voltage DC relay according to claim 1, characterized bythat a through hole for leading out the push rod is formed on the yoke iron plate (4), wherein an upper sleeve (9) is fixed inside the through hole, and wherein the upper sleeve (9) forms an upper guide hole (21) extending through in the vertical direction, and wherein the push rod and the inner wall of the upper guide hole (21) form a smooth contact. [5] Guide mechanism of the movable iron core (5) of the high-voltage DC relay according to claim 4, characterized by that at least three outwardly projecting ribs (25) are formed on the outer wall of the upper sleeve (9), wherein the ribs (25) are arranged longitudinally and are aligned parallel to the axis of the upper sleeve (9); and wherein the ribs (25) are distributed along the circumferential direction of the upper sleeve (9) at equal spacings on the outer wall of the upper sleeve (9). [6] Guide mechanism of the movable iron core (5) of the high-voltage DC relay according to claim 5, characterized by that the upper sleeve (9) comprises an upper part (22) of the upper sleeve (9), a central section (23) of the upper sleeve (9) and a lower part (24) of the upper sleeve (9), wherein the ribs (25) are arranged on the outer wall of the central section (23) of the upper sleeve (9), and wherein the lower part (24) of the upper sleeve (9) is a conical structure in which the diameter of the upper end is larger than the diameter of the lower end. [7] Guide mechanism of the movable iron core (5) of the high-voltage DC relay according to claim 6, characterized by that the upper part of the upper sleeve (9) is formed as an annular structure whose diameter is larger than that of the central portion (23) of the upper sleeve (9). [8] Guide mechanism of the movable iron core (5) of the high-voltage DC relay according to claim 1, characterized byin that the longitudinal section of the movable iron core (5) through the axis is H-shaped, wherein the upper end of the movable iron core (5) forms an upper cavity (31) of the movable iron core (5), and wherein the lower end of the movable iron core (5) forms a lower cavity (32) of the movable iron core (5), and wherein the upper cavity (31) of the movable iron core (5) passes upwards through the movable iron core (5), and wherein the lower cavity (32) of the movable iron core (5) passes downwards through the movable iron core (5), and wherein a fastening section of the push rod is arranged between the upper cavity (31) of the movable iron core (5) and the lower cavity (32) of the movable iron core (5), and wherein the push rod and the fastening section of the push rod form a threaded fastening.

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